Fig. 7From: Artificial noise-assisted physical layer security in D2D-enabled cellular networksThe power allocation ratio in scenario I versus the density of the base station λ b where λ e =0.0003/m 2, R e =0.5 bps/Hz, ε=0.1. Figure 7 illustrates the transmission power allocated to the information-bearing signal under the density of the base station, and shows that it is unnecessary to generate the artificial noise under specific conditionBack to article page